Nail expansion



April 13,1926. 7

H. W. PLEISTER ET AL NAIL EXPANSION Filed Nov. 12, 1924 Patented Apr. 13, 1926.

UNITED srarss PATENT oFFIcE.

HENRY W. rLEIs'rER, 0 WEsr IE n, ANI JOHEN Kaiirrz Y, or ,GARWOODL NEW JERSEY, ASSIGNORS r0 HENRY NEWHALL, OF PLAINFIELD, NEW JERSEY.

NAIL EXPANSION.

Application filed. November 12, 1924. Serial No. 749,404.

To all whom it may concern:

Be it known that we, HENRY W. PLEISTER, a citizen of the United States, residing at l Vestfield, in the county of Union and State of New Jersey, and JOHN IiARlTZKY, a citizen of the United States, residing at Garwood, in the county of Union and State of New Jersey, have made certain new and useful Improvements in Nail Expansion, of which the following is a specification taken in connection with the accompanying drawings.

Our invention relates to nail fasteners in which by merely driving the nail into the fastener, shield or expansion member, the work is secured to the wall or other suitable support.

Our invention more particularly relates to a ductile nail fastener preferably cast from lead or an alloy, or any other suitable ductile material, and which is provided with a'major slot to permit the nail to more readily expand the shield, and also provided with an expansible retaining collar to. resist any accidental or unintentional expansion due to strains and stresses 1H7 handling and transportation; and yet, this collar is such I that it will permit the nail to expand the shield or expansion member freely, either by the stretching of the collar, if necessary, or by breaking it, in extreme cases, to permit the nail to pass freely along the axial bore of the shield or expansion member.

Our invention further relates to such a ductile nail expansion provided preferably, though not necessarily, with a minor slot, arranged at the other end of the shield or expansion member, and at angle to the major slot. We also preferably though not necessarily, provide the shield or expansion member with a ductile head which can be upset by the head of the nail when it is fully driven into the shield or expansion member.

Our invention further relates tocertainbodiment of our invention, but it is of course 1 to be understood that our invention is'not to be confined to this embodiment shown by way of illustration.

Fig. 1 is a side elevation of our new ductile nail expansion;

I Fig. 2 is ahorizontal section on line 22 of Fig. 1, looking in the direction of the arrows;

Fig. 3 isan end view;

Fig. 4 is a vertical section on line 4-4 of Fig. 1, looking in the direction of the arrows;

Fig. 5 is a vertical section on line 5-5 of Fig. 3;

Fig. 6 is a horizontal section, showing the nail in its first position, partially expanding the shield or expanding member;

Fig. 7 is a vertical section on line 77 of Fig. 8 is a detail section on line 88 of Fig. 7 looking in the direction of the arrows,

and s'howingthe retaining col-l ar stretched but not broken;

Fig. 9 is a vertical section showing the nail driven home, and also. showing the second expansion due to the minor slot formed in the inner end of the shield Fig. 10' is a detail section, similar to Fig. 8, but showing the retaining collar fractured, due to-excessive stretching of the collar.

In the preferred form of our invention,

which is shown in the drawings, we cast our nail expansion or shield 1 from lead, or an alloy, or any other suitable ductile metal, providing it with anaxial bore 2, a major slot 3- extending inward from the head or end 4' and near the other end:5 of the shield or expansible member. The exact distance that this maj or slot extends w ll vary; preferably we extend it to the point 6.,- which. is relatively near the inner end 5 of the. ductile shield. I i

Near the outer end or head ewe-form, in

This collar 7,- preferably integral 1 with the; shield, preyentswthe two, parts 8 and 9 of the shieldbeing accidentally'sepother sit tio s. which wo ld s these members 8 and to become accidentally distorted.

This retaining collar, therefore, insures that the nail expansion or shield will keep its shape under all accidental or unauthorized strains and stresses to which it will be subjected. Yet, the retaining collar is such that it will stretch as shown at 10, 10 in Fig.

on the insertion of the nail 11. In extreme cases the retaining collar 7 will be broken by driving in of the nail 11, as shown at 12, 12 in Fig. 10. This stretching of the retaining collar, or the breaking of it in extreme cases, permits the nail to freely expand the shield.

In additional to the major slot 3 we preferably, though not necessarily, provide the ductile shield, or expansion, with a minor slot 14: extending from the end 5 towards the retaining collar 7 and head 1, and arranged at an angle preferably though not necessarily at 90 from the major slot 8.

In using our ductile nail expansion a hole 15 of the proper diameter, for the particular size nail expansion, is drilled or otherwise made in the wall 16 of masonry, brick, concrete, or similar material, and the shield or expansion member, is passed through a hole 17 in the work 18 to be supported on the wall 16. Preferably the retaining collar 7 is located on the exterior of the fixture or work 18 to be supported, as shown in Fig. 6. The nail 11 is then placed into the shield and given a blow with a hammer or similar tool.

When the nail is partially driven into the shield so that end 20 of the nail engages with the tapered inclined bore 21 of the axial bore 2, as shown in Figs. 6 and 7, the members O and 9 of the ductile shield are forced apart, thereby widening the major slot 3. It the nail is of a given diameter the retaining collar 7 may not be stretched on this first expansion. If the nail is of greater diameter, or if the. hole 15 has been poorly drilled and is atritle too large for the particular size shield, the parts 8 and 9 will be expanded sufficiently to stretch the retaining collar 7 as shown in Fig. 8. This might also be true if the hole 1? in the work or fixture 18 was too large to snugly fit the shield. In extreme cases, with an excessively large hole 15 in the wall and a large hole 17 in the fixture or work 18 to be supported, the ductile retaining collar 7 would be fractured as shown at 12, 12 in Fig. 10.

As the end 20 of the nail 11 is forced further into the shield, by successive blows of a hammer, it will cause the minor slot 14, to open or be enlarged. This will cause 'a secondary expansion of the end 5 of the shield, at right angles to the main expansion; this is shown somewhat exaggerated in l ie. 9.

It will, therefore, be clear that our preferred form of ductile nail expansion, but to which we are not to be limited, has two expansions and that these expansions occur successively in different planes, the last expansion being well back from the surface 24 of the wall 16.

In the preferred form of our ductile nail expansion the integral head 1 is adapted to be upset by the head 25 of the nail 11 as the nail is driven to its final position in the shield. This insures that the retaining collar 7 will be jammed or firmly pressed against the work or fixture 18 which will be lirmly held. This will also prevent any rattling or movement of the work or fixture with relation to the ductile nail expansion.

Our ductile nail expansion is particularly useful when it is desired to take down a fixture, or any other form of work 18, and substitute another fixture or work for it can be easily removed from the hole 15. If the outer end of the shield were cast solid, without the major slot 3, and then expanded in the hole 15, it would be very difiicult to remove the shield or expansion. Such a solid ended shield would become seated in the hole 15 in its expanded condition and would remain in that condition, even after the nail was withdrawn. Under such circumstances, if it is necessary to remove the old form of expansion shield, it would require that the old form be dug out of the wall. This of course takes time and is expensive besides the liability of defacing the wall. In our new form, on the other hand, when the nail is withdrawn the outer end of the shield will collapse more readily and permit the entire shield to be extracted without breaking it elf in the hole, or digging it, or parts of it, out of the hole.

Having thus described this invention in connection with an illustrative embodiment thereof, to the details of which we do not desire to be limited, what is claimed as new and what is desired to secure by Letters Patent is set forth in the appended claims.

\Vhat we claim is:

1. A new article of manufacture compris ing a ductile expansion shield provided with l a head at one end and with a major slot extending through the head, and also provided with an expansible retarding collar straddling the major slot and adapted to retard the expansion of the head of the shield.

2. 11 new article of manufacture comprising a ductile expansion shield provided with a head at one end and with a major slot extending through the head, and also provided with an integral expansible retarding collar straddling the major slot and adapted to retard the expansion of the head of the shield.

new article of manufa ;t1.. ue comprising a ductile nail expansion shield provided with major and minor slots arranged at an angle to each other, and expansible means mounted near one end of the shield and bridging the major slots.

4%. A new article of manufacture comprising a ductile nail expansion shield provided with major and minor slots arranged at a closed angle to each other, and an expansihle retaining collar, mounted near one end of the shield.

5. A new article of manufacture comprising a ductile nail expansion shield pro vided with a slotted head which is adapted to be unset by the head of a nail, and also provided with an expansihle retaining collar adjacent the head.

6. A new article of manufacture comprising a ductile nail expansion shield provided with an integral slotted head which is adapted to be upset by the head of a nail, and also provided with an integral expansible retaining collar adjacent the head.

7. A new article of manufacture comprising a ductile nail expansion shield provided with a ductile head atone end and with a minor slot at the inner end and a major slot arranged at an angle to the minor slot, said major slot extending through the head towards the other end of the shield to permit expansion in one direction, and also provided with an expansible retaining collar to retard that expansion.

HENRY V. PLEISTER. JOHN KARITZKY. 

